package net;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class TcpEchoServer {
    private ServerSocket socket=null;
    public TcpEchoServer(int port) throws IOException {
        socket=new ServerSocket(port);
    }

    public void start() throws IOException {
        ExecutorService pool=Executors.newFixedThreadPool(10);
        while (true){
            Socket clientSocket =socket.accept();

            pool.submit(new Runnable() {
                @Override
                public void run() {
                    try {
                        processConnetion(clientSocket);
                    } catch (IOException e) {
                        throw new RuntimeException(e);
                    }
                }
            });
        }
    }

    private void processConnetion(Socket clientSocket) throws IOException {
       try (InputStream inputStream=clientSocket.getInputStream();
            OutputStream outputStream=clientSocket.getOutputStream()){
           Scanner scanner=new Scanner(inputStream);
           while (true){
               if (!scanner.hasNext()){
                   break;
               }
               String requst=scanner.next();
               String response=process(requst);

               PrintWriter printWriter=new PrintWriter(outputStream);
               printWriter.println(response);
               printWriter.flush();
           }


       } catch (IOException e) {
           throw new RuntimeException(e);
       }finally {
           clientSocket.close();
       }
    }

    private String process(String requst) {
        return requst;
    }

    public static void main(String[] args) throws IOException {
        TcpEchoServer server=new TcpEchoServer(9090);
        server.start();
    }
}
